Chow-Witt groups and Milnor-Witt motives
演讲者
时间
2022年09月19日 15:30 至 17:00
地点
1129B
线上
Zoom 537 192 5549
(BIMSA)
摘要
Chow-Witt group is the quadratic refinement of Chow group which applies to classifications of vector bundles, Hermitian K-theory and refined enumerative geometry.
In this talk, we explain how to derive Chow-Witt group from the question of finding nowhere vanishing sections of vector bundles. Then we interpret the motivic method to compute Chow-Witt groups and how Bockstein SS is naturally involved, including the computation of fiber bundles and blowups.
演讲者介绍
杨南君，本科毕业于北京航空航天大学，硕士博士毕业于格勒诺布尔-阿尔卑斯大学，博士导师Jean Fasel。之后在丘成桐数学科学中心做博后，现在是BIMSA的助理研究员。研究方向为代数簇的Chow-Witt群。研究成果发表在Camb. J. Math., Ann. K-Theory等期刊上。